Questions tagged [missing-data]

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15 views

Geopackage drops fields during import [closed]

When I use the ogr2ogr -f command to create a geopackage the first layer imports correctly but every layer after that drops fields. Can anybody explain why it does this?
3
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1answer
114 views

Interpolating LiDAR intensity images in R?

I'd like to generate 0.5 m intensity images using lidR, but the resulting raster is full of pits. Here's a reproducible example: library(lidR) LASfile <- system.file("extdata", "MixedConifer.laz", ...
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2answers
376 views

Getting a masked raster with no NAs and sum pixels within overlaying polygon?

I have done an IDW interpolation in R for precipitation data following the routine of Manny Gimond (https://mgimond.github.io/Spatial/interpolation-in-r.html) to get precipitation inside a catchment. ...
1
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1answer
57 views

Placing Excel Data in ArcMap/ArcScene similar to Image Georeferencing

I have XYZ-dataset of Temperature Data in Excel, with no (Lat, Lon) added. Every time when I try to display the Data in ArcScene the Programm tells me, that a Spacial Reference is missing (of course)....
1
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3answers
100 views

Missing feature from Shapefile

I have loaded a shapefile into QGIS that has been generated in a third party piece of software. When I view the attributes table, all items are there (20 survey lines), when I view the map only 19 ...
1
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0answers
112 views

Only some points visible in CSV layer

I understand that this question has been asked before in one form or another, but unfortunately those answers haven't been able to solve my issue. I've imported a .csv file into QGIS and all the ...
1
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1answer
147 views

Georeferencer - GDAL is missing on the QGIS 3

OS - ArchLinux 64bits SPECS - i3-3220 - 6gb ram QGIS 3.0.3 installed as follow. $ sudo pacman -S qgis gdal python-gdal python-psycopg2 python-owslib python-yaml python-pygments $ yaourt -S python-...
0
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0answers
24 views

Point/Feature to Raster-unwanted Grid of missing Data raster Cells-ArcGIS10.5

I tried to convert some point data (points on a regular grid of 100m by 100m) with the Feature to Raster Tool and the Point to Raster Tool (Rastersize of 100m) but in the resulting Rasterfile there is ...
1
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1answer
176 views

QGiS - Values missing from graduated style

I'm trying to do the very simple/standard task of presenting points (and then polygons created from them) as a graduated colour style, however many points are missing, evinced from the lowest number ...
0
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1answer
236 views

Features show on data view, but not in Attribute table?

There are 966 points for tree data that was collected in the field. When I try to open the attribute table only 2 points' data show up. I've tried to create layer from selected, because when I choose ...
1
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0answers
104 views

Space-Time Principal Component Analysis with Missing Lat/Long Data [closed]

I am looking to run a space-time Principal Component Analysis on Shotspotter data from Brockton, MA: http://justicetechlab.org/data/. Shotspotter sensors record the timing, location, and number of ...
1
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2answers
1k views

Replace NA's with 0 for large raster data using R?

I want to replace all NA values in a large raster with 0. I found this answer: Replace NA's with 0 for raster data using R? #getting a raster library(raster) f <- system.file("external/test....
0
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1answer
175 views

Adding missing locations on OpenStreetMap programmatically for Android application?

i am working on android application using osm. Many locations are not on osm that google map providing. But i need to show all missing locations on osm also. what can i do to solve this problem? Can ...
1
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0answers
48 views

Missing Values in Crop identification using Python? [closed]

I am developing a Python based process that classify crops via time series analysis. Due to clouds there are many missing values. My problem is how to assign a value to these pixels that would be near ...
1
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3answers
428 views

ArcGIS Attribute Table - Latitude, no Longitude

I received a shapefile from an online source, and in the attribute table it shows a column and values for latitude; but there is nothing for longitude. I have not used ArcGIS for some time, and I don'...
0
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1answer
205 views

Python add-in button tool giving saying missing toolbar when I add it onto my map?

I am looking to create a button that when clicked, clears feature classes and tables created from another tool. I set up the button and installed it but every time I add it to the map with a toolbar ...
4
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3answers
528 views

Merging one DEM into another to fill in missing data using QGIS?

I have a LiDAR dataset with some missing data right in the middle of my map. I would like to use a 5m DEM to fill in the missing areas. Is there a way in QGIS to merge the two but only use the 5m ...
2
votes
1answer
608 views

R kriging cross validation returns NA for all prediction points?

I'm trying to cross-validate the results of an [auto]Krige output but for some unknown reason the results of both autoKrige.cv (automap package) and krige.cv (gstat package) return NA for all values (...
5
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1answer
279 views

Zones missing after running zonal statistics in ArcGIS Spatial Analyst?

I have a problem using zonal statistics in ArcGIS. My raster contains values/data with 30m cells. I had several vector layers, containing administrative subdivisions of Belgium. I have converted the ...
1
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0answers
74 views

Extracting specific OpenStreetMap tags in ArcGIS Desktop? [duplicate]

The purpose of my research is to look into public ITS (Intelligent Transport System). To do this in a realistic way I need not only the city map but also the public transport routes. I work with ...
1
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0answers
68 views

Filling missing pixels of ASTER DEM

I need to perform hydrological analyses and map design purposes (hillshade creation) on a region far north. It is too northern to be covered by the SRTM DEM, therefore I am using the ASTER DEM. ...
1
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0answers
29 views

Generating missing yearly data, based on a more detailed temporal data set

I have several very large raster data sets of land use classifications (ie. forest, wetland, argicultural, etc). The most comprehensive data spans 2009-2015. I have reclassified this data to match ...
0
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1answer
311 views

Filling null attributes with mean attributes of neighboring polygons using ArcGIS Desktop?

I have a layer of polygons, where in some polygons there is missing data (null). I would like to fill these missing attributes by the average attributes in neighboring polygons. Is there a simple way ...
3
votes
2answers
924 views

Error gap-filling Landsat 7 SLC-off with QGIS 2.18.3 on Windows 10

I am trying to gap-fill Landsat 7 SLC-off images with open-source software as explained in the comment below this post. I'm new to QGIS and have almost no knowledge with Python (I'm a GIS novice ...
1
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0answers
77 views

Missing Observations in Zonal Statistics Tool

I am using zonal statistical tools. I have field boundary shapefile which has 1,062,063 observations. I am using zonal statistical as table tool to obtain precipitation values from raster layer. ...
2
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0answers
55 views

Finding pre-processed MODIS products?

I am trying to recognize burnt areas based on some MODIS products and I just realized that I am missing a bunch pixels from the coastline masking. As you can understand that is an issue because I am ...
4
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0answers
128 views

Why do first returns have more blanks than last returns in LiDAR data? [closed]

I'm working on an ASCII LiDAR file that has the first and last pulse returns included. Can anyone tell me why a first pulse return may come back with more blank spaces in the data than a last pulse ...
1
vote
1answer
48 views

QGIS - Have spreadsheet with col from 0% to 100% plus null want 100 bin gradient plus one more for null

Newbie alert. Have a spreadsheet with no geo; has a col with values in there from 0% to 100%, plus several blanks/nulls. Ideally would like a 100 step (bin) gradient fill from 0 (100% black) to 100 (...
4
votes
1answer
658 views

How to generate missing points in GPS trajectories?

I have some GPS trajectories that include gps locations recorded on variable frequencies (every 1 min ,5 min , 20 min,etc.)using a geographic projection WGS84. In my work, i need a fine-grained GPS ...
2
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0answers
1k views

QGIS Polygons missing after saving edits

Right, I am slightly worried. I opened QGIS this morning to discover that part of the work I did yesterday was not there (the attributes where present in the table, but were not digitised anywhere on ...
0
votes
1answer
95 views

How can I find the missing data from the downloaded bulk TRMM data?

I have downloaded TRMM daily precipitation estimates for Indian Sub-continent from 1988 to present. I see that there are a lot of missing data days. I was wondering how can I possibly detect the daily ...
0
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1answer
377 views

Fusion Tables missing from Google Drive [closed]

Many of my Fusion Tables are missing off my Google Drive account, has anyone else experienced, and hopefully resolved, this issue?
1
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1answer
566 views

Parts of geometry disappearing in QGIS export to Illustrator PDF?

I'm having this issue with certain polygons when I export to PDF. Everything looks fine in QGIS, everything fine in print composer, everything fine in the PDF as viewed in Preview or Adobe Reader. ...
1
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2answers
557 views

Export GRASS raster as GeoTIFF : nodata values exported as -nan (what happens in R?)

I am using the package raster to work with GeoTIFF raster files which I exported from GRASS using r.out.gdal. GRASS assigned the value -nan to some raster files (type FLOAT32) for missing values. ...
3
votes
0answers
339 views

Missing data and negative predictions when kriging daily rainfall? [closed]

I want to perform the interpolation of daily rainfall data for 7 years. I am now working on python using arcpy module. I face several problems while performing interpolation Some day there is no ...
2
votes
1answer
744 views

Kriging from raster with missing data in ArcGIS

I have MODIS satellite imagery that depicts a range of surface temperatures. However, many of the cells are missing values. I think I need to perform Kriging in order to obtain an average value for ...
1
vote
1answer
971 views

How to treat missing values as null

I have an excel file with missing values encoded as blanks and I want this excel file to be converted into DBF but with the conversion process, the blanks (missing values) become 0. The reason I am ...
1
vote
1answer
260 views

ArcGIS: Assigning values to missing attribute data for line layers

I have a large road network layer with an AGE attribute associated per segment. In some occasions, I would have segments A -> B -> C with segment B with no value for the AGE field. In other ...
7
votes
1answer
344 views

Interpolating points observed with different time duration

I am doing spatial interpolation with a group of points. Some points have complete observation of events: for a period of 24 hours we have observed N events in each point. These points have N events....
7
votes
1answer
9k views

Replace NA's with 0 for raster data using R?

I am new in R. How can I replace NA's with 0 for my raster data which have spatial information?